I upgraded our SQLdm to 10.3 a few days ago and now I'm seeing a table named "AMExtendedEventsDirectoryTree" being created and dropped in the tempdb database every 2 mins or so. Is this normal?
Do you have DM 10.3.1 or DM 10.3?
If you don't have DM 10.3.1 then download and upgrade and see if the behavior changes. If you still see this symptom then please open a case with Tech Support.